Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eca591a62b600ad…

MALICIOUS

PDF

93.7 KB Created: 2021-03-19 00:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b8a8d5dc7ca0be2e98265d40d5824282 SHA-1: ac2ede926a69cb1c1d50bbeaddf813294bde4642 SHA-256: 6eca591a62b600ad130fdcbc96dc035c47a9f835c25f002ff21558d8f6af60f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of links designed to appear as legitimate content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malicious content via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/award?keyword=tomb+of+annihilation+player+handouts+pdf PDF link annotation
    • http://doordash.link/252922309380724c.pdfIn PDF document text
    • http://kimuzufar.22web.org/senior_graphic_design_jobs_atlanta.pdfIn PDF document text
    • http://uspex22.online/1765020043dji24.pdfIn PDF document text
    • http://ledavikoti.iblogger.org/ford_mustang_shelby_gt350r_hp.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/jb7whhO/music_landmarks_seattle.pdfIn PDF document text
    • http://wersita.space/how_to_interpret_c13_nmrpdpnj.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxoximez/gfAhapd/barbour_womens_size_guide.pdfIn PDF document text
    • http://cetop.xyz/41452441263pht28.pdfIn PDF document text
    • http://hytri.com/mevovesenakapebatuzupapatfqy7z.pdfIn PDF document text
    • http://waystep.site/hp_k8600_printhead_cleaningekfzh.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/dOhjQhb/35374321302.pdfIn PDF document text
    • https://logesili.weebly.com/uploads/1/3/5/3/135389335/biramigovugunisug.pdfIn PDF document text
    • https://sokezimipadivob.weebly.com/uploads/1/3/5/9/135959039/93128d2c577.pdfIn PDF document text
    • http://weinmvc.net/which_college_is_best_for_mechanical_engineering2ee8m.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/golibedoviwasitewevavyun9d.pdfIn PDF document text
    • http://picsonair.com/xilulumogagazopujox8os6n.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/higcjbP/71825525626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d284611-b5a1-4091-b23f-da279a398633/benners_novice_to_expert_theory_background.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e75ad16-ee7c-4560-9129-f55c42fc9097/61498533564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba42a2e-4af0-49ed-9fce-34924e9e0a6c/what_items_should_not_be_in_a_first_aid_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bfda46-8da3-48eb-96eb-08c065d22770/31741639153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb741e43-609b-456b-8b69-f103706018e8/61219037756.pdfIn PDF document text
    • http://tapanowi.epizy.com/blayney_public_school_uniform.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA0 5472 bytes
SHA-256: 9f2b540beb736b86f5f21a74695a02eed81ae822ee14a5a94c86aee86683c738
font_01_sfnt_off00014210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14210 12284 bytes
SHA-256: 3a6893cd6c66257ffd8fac1d67aa4bceeb560f47ffdf2b36a046e2424021d582